Vat dyestuff preparations



UNITEDSTATES PATENT orrlce- VAT DYE STUFF PREPARATIONS Hermann Berthold, Leverkusen-on-the-Rhine, Germany, assignor to General Aniline Works, Inc., New York, N. Y., a corporation of Delaware No Drawing. Application November 18, 1930, $553M No. 496,558. In Germany November 19,

23 Claims. (01. 8-5) The present invention relates to new vat dyediglycerol and the like. The pastes thus obstulT preparations suitable for printing purposes, tainable are very stable, do not deposit or dry to a process of printing textile fibers with thesev up, do not form crusts and can be applied for preparations and to the printed fabrics obtainprinting purposes even after prolonged storing. 60 able by the application of said dyestuff prepara- In some cases it will be of advantage to work tions. in the following manner: The dyestufi is sus In accordance with the invention hydroxy anpended in water, glycerine or another water soluthraquinones or substitution products thereof,,or ble alcohol as mentioned above is added and the also reduction products of these substances, which dyestufi" reduced in this suspension by means of 65 10 still contain oxygen in the ms-position or mixa reducing agent customariy employed in vatv tures of compounds of these types are employed dyeing and in the presence of an alkali such as to influence favorably the capacity for printing caustic soda solution, caustic potash solution or of vat dyestuffs, that is, to improve the strength preferably a weaker alkali such as ammonia, of the printings obtainable and at the same time sodium carbonate, potassium carbonate or the 70 the speed of fixation. like. As reducing agents alkali metal hydro- The further addition of anthraquino'ne or resulfites, titanium trichloride etc. will be suitable duction products thereof containing oxygen enones. A hydroxy anthraquinone or a reduction hances the efficacy of the first mentioned prodproduct thereof containing oxygen in the msucts in many cases. position is added to'the preparations above men- 75 0 The hydroxy anthraquinone, and also the antioned at any desired stage of their manufacthraquinone or the reduction products of these ture. The dyestufi pastes thus obtainable consubstances are preferably applied in a finely ditaining the dyestuff in a reduced form (in the vided state for the purposes of the present process. case of applying a rather weak alkali such as This may be accomplished in a variety of ways. ammonia, soda or potash probably in the form Thus, for example, the substances in question of the free leuco acid) likewise do not deposit, may be finely ground or they may be dissolved in do not congeal, do not form crusts, and for sulfuric acid and reprecipitated with water or, printing purposes possess similar advantages as in so far as they are soluble in alkali, they may the preparations mentioned before. be dissolved in caustic alkalies, for example, in Besides the hydroxy anthraquinones and/or caustic soda solution and reprecipitated with their reduction products above specified, anthramineral acids. Finally, they may be reduced, quinone or its reduction product containing oxywholly or in part, if desired in the presence of gen and/or so-called hydrotropically acting glycerine or other similar polyvalent alcohols agents may be added. Under the term hydro-, soluble in water, and thus be obtained in a tropically acting agents I understand comcondition which does not lead to deposition. pounds promoting the solubility of water insolu- This method of working shows technical advanble or difficulty soluble substances in water (comtages in so far as expenses are obviated in repare Neuberg, Biochemische Zeitschrift vol. 76, spect of milling, drying or dissolving in sulfuric (1916) page 107 if.; Tamba, Biochemische Zeitacid and precipitation therefrom, as well as schrift, vol. 145, (1924) page 415 ii; Neuberg, washing until neutral, and furthermore in so far Sitzungsberichte der kongl. preuss. Akademie der as this process canbe combined with that of Wiss. 1916). Suitable hydrotropically acting the manufacture of the dyestufi preparations to agents are for example: Urea, substituted ureas, one step of working. thiourea, hexamethylenetetramine, the potassi- The incorporating of the hydroxy anthraum salt of ethylether sulfonic acid or -methyl- 100 5 quinones or their reduction products containing ether sulfonic acid, the alkali metal salts (inoxygen in the ins-position within the dyestuffs eluding ammonium salts) of the following acids: may be accomplished in a variety of ways. For isobutyric acid, phenylacetic acid, benzoic acid, example,.the difierent constituents may be mixed ortho-toluene carboxylic acid, salicyclic acid, the in the dry state or in form of aqueous pastes; benzene sulfinic acids, 1.4-toluene sulfinic acid, 105 or, the hydroxy anthraquinone etc. may be addthe benzene sulfonic acids, para-toluene sulfonic ed to the printing colors at any stage of their acid, naphthalene sulfonic acids, for example, manufacture. The best results generally are obnaphthalene-lor 2-sulfonic acid, aniline sultained when adding the hydroxy anthraquinones fonic acids and substitution products thereof, to aqueous pastes of the dyestuffs containing such as for example, dimethylmetanilicor disoluble alcohol, such as glycol, thiodiglycol, thiofonic acid, dimethyl-baminobenzoic acid, alkali glycerine or another similar polyvalent water ethylmetanilic acid, dimethyl-2toluidine-4-sulmetal salts of hydroaromatic carboxylic and sulfonic acids, as for example the cyclohexane carboxylic acid, tetrahydronaphthalene-p-sulfonic acid and the like.

It may be mentioned that the hydrotropically actmg agent to be used in a particular case will depend onvthe nature of the dyestuif to be printed as well as on the printing method applied.

Instead of the pure hydroxy anthraquinones mixtures of the same can be applied, for example the technical mixture of 2.6- and 2.7-dihydroxyanthraquinone, or substituted hydroxy anthraquinones such as halogenated hydroxy anthraquinones, aminohydroxyanthraquinones etc.

For printing purposes the preparations described above are worked up to printing colors in any desired manner. For example, the dry preparations may be made up to aqueous pastes suitably in the presence of glycerine, ethylene glycol or another similar polyvalent water soluble alcohol, a thickening of any desired composition is added, furthermore caustic soda solution and sodium hydrosulfite, and the mixture heated to C., until the dyestuff has dissolved in the form of its leuco derivative. After cooling, sodium formaldehydsulfoxylate and potassium carbonate are stirred into the mixture. Cotton or another suitable textile product is printed with this printing color, the printings are steamed, for example, in a Mather-Flatt apparatus and developed by a treatment with suitable oxidizing agents such as oxygen (air), potassium bichromate and acetic acid and the like. printings are soaped while boiling.

' Another method of printing with my preparations will be as follows:

The powdery preparations are made up to an aqueous paste, a thickening, glycerine, potassium carbonate and sodium formaldehydeoxylate are added and textile products are printed with these Finally the printing colors containing the dyestuif in the unthe type of dyestufl applied. According to this process also my dyestufi preparations, obtained by reducing the dyestuil's in the presence of water, glycerine and an alkali, preferably one which is'weaker than caustic alkali solutions, such as ammonia, sodium carbonate, potassium carbonate etc., may be worked up to printing colors and applied for printing purposes. It may be mentioned ,that also in this case the, addition of a suitable reducing agent, such as sodium formaldehyde sulfoxylate and of an alkali and in most cases of glycerine, thiodiglycol or thelike, to the printing color will be necessary or at least advantageous in order to obtain the-best results.

The following examples illustrate the invention without limiting it thereto:

Example 1.400 grams of 2-hydroxyanthraquinone are made into a paste with 800 grams of glycerine and 3000 grams of water and reduced at 70 C. by means of 800 grams of aqueous ammonia (25%) and 160 grams of sodium hydrosulflte, whereby a mixture of finely divided 2-hydroxyanthraquinone and reduction products of,

the same is formed. The mixture is evaporated on the water bath until it contains about 25% of 2-hydroxyanthraquinone or reduction products thereof.

Example 2.-From 20 parts by weight. of 6,6- dichloro-4,4'-dimethyl-bis-thionaphthene indigo, 4 parts by weight of glycerine, 6 parts by weight of 2-hydroxyanthraquinone (25% paste) and 70 parts by weight of a'thickening of the following composition.

a printing color is produced by heating for ashort time at 50-60 C. and'employed for printing in the customary manner. The printed fabric is dried and steamed moist for 5 minutes. The dyestufi is developed by means of potassium dichromate-acetic acid mixture (2 grams of potassium dichromate, 5 ccs. of 30% acetic acid Marseilles soap.

Instead of 2-hydroxyanthraquinone paste reduction products or mixtures of the same with 2: hydroxyanthraquinone, obtainable according to Example 1 or l-hydroxyanthraquinone and reduction products thereof, can also be employed.

Instead of the above dyestufi 6.6-diethoxy- 2.2'-bis-thionaphthene indigo can be employed 119 or also the brown dyestufi obtainable from naphthoxy-thionaphthene-carboxylic acid In all cases a deeper shade is attained coupled with improved fixing compared with that obtainable without the addition of the saidanthra-- quinone derivatives. 1

Example 3.By replacing the dyestuffs indicated in Example 2 by the 2.7-dibromo anthanthrone obtainable by bromination of anthan-- thr or by the dyestuif given in the Colour in ex No. 1135, page 2'11 (4. 8-dianisoyl-diamino- 1.5-dihydroxyanthraquinone) or by the dyestufi give in the Colour index No. 1134, page 2'71 (4-" benzdylamino-8-anisoylanflno- 1.5 dihydroxyanthraquinone) 'or by dimethoxydibenzanthrone (Caledon-jade green, Colour index No. 1101, page 26 5) or by 5.5-dibenzoylamino-dianthraquim.

onyl-1.1'-oxamide, or by dichloroisoviolanthrone (Colour index, 1. edition, No. 1104) andby emi ploying finely dividedanthraflavic acid instead of the z hydroxyanthraquinone mentioned in Example ;2, deeper and better fixing printings are likewise, obtained than without the addition of anthrailavic acid.

Example 4.-The following combinations, afterworking up to printing pastes in accordanfie with Example 2, yield similar favorable results:

1. The dyestufl from G-methoxy-B-hydroxythion aphthene and 4-methyl 6 bromo-2.3-dihydro 3 ketothionaphthene- 2 (para-dimethyl amino) -anile (Example 6 of German Patent No. 419,867) with the addition of 2-hydroxy-1- chloroanthraquinone or l-hydroxy-l-chloroanthraquinone or 1.5-dihydroxyanthraquinone.

2. The dibenzopyrene-quinone obtainable, for example, by reacting upon Bz-l-benzoyl-benzanthrone with aluminium chloride at 180 C. with the addition of 2-hydroxy-1-chloroanthraquinone.

3. The dyestuff given in the Colour index No. 1118 (flavanthrone) page 268, or the dyestuff which is obtained from 2-methyl-4-chlorophenyl-thioglycollic acid by heating with strong sulfuric acid on the water bath, or dimethoxy-dibenzanthrone, (Colour index No. 1101, page 265) with the addition of 1.8-dihydroxyanthraquinone.

Example 5A.-1869.2 grams of a 10% aqueous paste of 6.6-diethoxy-2.2-bis-thionaphthene indigo, 33.1 grams of anthraquinone (30.2% paste), 81.8 grams of 2-hydroxyanthraquinone (12.23% paste), 400 grams of glycerine (88%) are reduced at 70 C. with 400 grams of ammonia (about 25%) and grams of sodium hydrosulfite, after the reduction incorporated with grams of sodium benzenesulfonate and concentrated until the paste is 11.8% (calculated on the content of the dyestufi) Example 5B.-From 20 parts by weight of the dyestuff preparation obtainable according to the directions of Example 5A, and 80 parts by weight of a thickening, containing:

Grams Tragacanth 65:1000 ,170 Commercial gum 1.1 :,160 Wheat starch 60 Water 150 British gum powder 60' Glycerine 100 Potash 150 Sodium formaldehydesulfoxylate 150 per 1000 parts, a printing color is produced without heating and allowed to stand overnight. Printings obtained with this printing paste according to the directions of Example 2 show a considerably increased fixation in contradistinction to a printing, produced with the usual commercial, aqueous dyestuif paste without the addition of anthraquinone derivatives and hydrotropic agents.

Example 6.-368.7 grams of a 10.85% paste of the dyestufl 4.8-dianisoyldiamino-1.5-dihydroxyanthraquinone (Col. Ind. No. 1133, p. 271), 68.3 grams of anthraflavic acid, finely ground and 80 grams of glycerine (88%), and, if desired, 40 grams of urea are concentrated with stirring until the dyestuif content amounts to 10.85%. The dyestufi preparation is then passed through a fine sieve and forms a non-depositing paste of desirable ointment-like consistency, which does not congeal and form incrustaticns. A printing produced in an analogous manner to Example 5B shows increased intensity and a considerable improvement in regard to fixation in contradistinction to a printing from ordinary dyestuif paste. Similar results are obtained when using in this example instead of 4.8-dianisoyldiamino- 1.5-dihydroxyanthraquinone aqueous pastes of the other dyestuffs mentioned in Example 3.

Example 7.By replacing the dyestuff of Example 6 by the dyestuif of Example 1 of the U. S. Patent No. 1,667,848, and evaporating until the dyestufi content amounts to 18%, considerably fuller printings (about 40% increase of intensity) and better fixing are likewise obtained than with printings by means of the ordinary dyestufi' printin pastes without addition of anthraflavic acid.

Example 8.100 grams of a 10% aqueous paste of 4.5'-dibenzoyldiamino-1.1'-dianthra quinylamine-carbazol, 20 grams of crude glycerine and 10 grams of a 10% aqueous preparation obtained from anthrafiavic acid in accordance with Example 1, or '1 gram of finely ground anthraflavic acid, are evaporated until the preparation has a dyestufi content of 11.8%. The paste thus obtained is passed through a fine meshed sieve. On using the resulting paste for printing purposes, after the addition of the usual ingredients, better fixed and stronger printings, for example, on cotton, wool or acetate silk are obtained, than without the addition of the anthraflavic acid preparation.

10 grams of urea or another hydrotropically acting agent, such as sodium dimethylmetanilate, sodium dimethylsulfanilate, sodium naphthalene-p-sulfonate or mixtures of such substances may be added besides the anthraflavic acid preparation with good eflect.

Instead of applying the 10% aqueous paste of 100 the dyestuff higher concentrated'pastes or water containing press cakes of the same may be applied, in which case evaporation will be unnecessary. The dyestuffs of Example 3 may be applied in this example with a similar result.

Example 9.-A mixture of 2417 grams of an aqueous 16.6% paste of dibromopyranthrone, 800

grams of crude glycerine (88%) and 40 grams of the disodium salt of anthraflavic acid is evaporated to a dyestuff content of 12%. This paste, when applied for printing purposes, exhibits sim' ilar effects to those described in Example 8.

400 parts of urea or another hydrotropically acting agent such as sodium benzene sulfonate, sodium dimethyl-sulfanilate, sodium naphthalene-aor B-sulfonate 0r sodium-tetrahydronaphthalene-fl-sulfonate may be added besides the sodium salt of anthrafiavic acid whereby the utility of the paste for printing purposes is still increased.

Example 10.400 grams of a 10% aqueous paste of 6.6-diethoxy 2.2'-bis-thionaphtheneindigo, 2 grams of anthraflavic acid (finely ground or in the form of an aqueous paste), 80 grams of glycerine are reduced with 100 grams of aqueous ammonia 25% and 20 grams of sodium hydrosulfite at 70 C. 30 grams of sodium benzene sulfonate are added and the mixture evaporated to a dyestuif content of 12%. The paste thus obtained can be applied for printing purposes in accordance with Example 53.

By applying in this example 6.6-dichloro-4.4'- dimethyl bis-thionaphtheneindigo and phthalic acid or phthalic anhydride as hydrotropically acting agent a dyestufi preparation valuable for printing purposes is likewise obtained.

The preparations of this example furthermore possess valuable properties in slop padding processes.

Example 11.50 grams of the dyestuif of the probable formula:

together with 300 grams of water, 100 grams oi glycerine 88%, 88 grams of ammonia, (25%) are reduced at 70 C. with 20 grams of sodium hydrosulfite and evaporated with the addition of 5 grams of anthraflavic acid (finely ground) and 12.5 grams of sodium dimethyl-sulfanilate to 250 grams, that is to say, to a paste of 20% dyestuif content. The preparation gives a more complete black with better fixing than the dyestuif only suspended in water.

Instead of glycerine, other suitable organic alcohols soluble in water, such as ethylene-glycol may be used.

When applying the dyestuif above mentioned together with rather small amounts (e. g. about 5-10%) of a yellow to orange vat'dyestuff, especially beautiful black shades are obtainable.

The anthraflavic acid may also be added before the reduction.

' If desired 20 grams of sodium benzene sulfonate may be added and the mixture evaporated to a dyestuff content of 20%. The' paste thus obtained is stable and may be applied for printing purposes, after working up to a printing color in 4.8-dianisoyldiamino-1.5-dihydroxy anthraquinone and finely divided anthraflavic acid.

5. A dyestufl printing preparation comprising the dyestufl of the probable formula:

and anthraflavic acid.

6. A dyestuif printing preparation comprising the dyestufi of the probable formula: 7

anthraflavic acid and glycerine.

7. A dyestuif printing preparation comprising the dyestuif of the probable formula:

anthraflavic acid, glycerine and a hydrotropic agent.

. compound'of the group consisting of glycerine and similar water soluble polyvalent alcohols, 35

and a compound of the group consisting of hydroxy anthraquinones, which may be substituted in the nucleus by halogen atoms or amino groups, and such reduction products of these compounds, as still contain oxygen in the meso-position.

10. A dyestufl printing paste comprising an unreduced vat dyestufi, glycerine and a compound of the group consisting of hydroxy anthraquinones, which may be substituted in the nucleus by halogen atoms or amino groups, and such reduction products of these compounds, as still contain oxygen in the meso-position.

11. A dyestuif printing paste comprising an unreduced vat dyestuff, glycerine and a compound of the formula fl U 3 wherein the :rs mean hydrogen or one :2 stands for hydrogen and the other a: for the hydroxy group.

12. A dyestuff printing paste comprising an unreduced vat dyestufi, glycerine and anthraflavic acid.

13. A dyestufi printing paste comprising a reduced vat dyestufi, glycerine and a compound of the formula wherein the zs m'ean hydrogen or one 3: stands for hydrogen and the other a: for the hydroxy v group.

14. A dyestuif printing paste comprising a reduced vat dyestuff, glycerine and anthraflavic acid. C

15. A vat dyestuff printing paste comprising a compound of the group consisting of glycerine and similarwater soluble polyvalent alcohols, a hydrotropically'acting agent and a compound of the-group consisting of hydroxy anthraquinones, which may be substituted in the nucleus by halogen atoms or amino groups and such reduction pr ucts of these compounds, as still contain oxygen in the meso-position.

16. A dyestutf printing paste comprising an unreduced vat dyestuff, glycerine, a hydrotropically acting agent and a compound of the group consisting of hydroxy antraquinones, which may be substituted in the nucleus by halogen atoms or amino-groups, and such reduction products of these compounds, as still contain oxygen in "the meso-position.

17. A dyestuif printing paste comprising an unreduced vat dyestuff, glycerine, a hydrotropically acting agent and a compound of the mula wherein the :cs mean hydrogen or one :1: stands for hydrogen and the other a: for the hydroxy group.

18. A dyestufi printing paste comprising an unreduced vat dyestuif, glycerine, ahydrotropically acting agent and anthrafiavic acid.

19. A dyestufi printing paste comprising a reduced vat dyestufi, glycerine, a hydrotropically acting agentand a compound of the formula 2: E 011. Ill) wherein the as mean hydrogen or one :1: stands for hydrogen and the other a: for the hydroxy group.

20. A dyestufi printing paste comprising a re- Ior- ' i i U U I- ii wherein the ms stand for hydrogen or one :1: stands forhydrogen and the other a: for the hydroxy group.

23. The process which comprises printing cotton with a printing paste derived from a vat dyestuff, said paste containing anthraflavic acid.

HERMAN BERTHOLD. 

